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    Typical Fouling Factors [m2K/W]



    Cooling Water


    Conditions
    cooling water < 50 C
    cooled fluid < 120 C
    cooling water > 50 C
    cooled fluid > 120 C
    Cooling Water velocity
    v < 1 m/s          v > 1 m/s          v < 1 m/s          v > 1 m/s         
    Type of Water
    Sea0.000090.000090.000180.00018
    Brackish0.000350.000180.000530.00035
    Cooling tower with inhibitor0.000180.000180.000350.00035
    Cooling tower without inhibitor0.000530.000530.000880.0007
    City grid0.000180.000180.000350.00035
    River mimimum0.000180.000180.000350.00035
    River average0.000530.000350.00070.00035
    Engine jacket0.000180.000180.000180.00018
    Demineralized or distilled0.000090.000090.000090.00009
    Treated Boiler Feedwater0.000180.000090.000180.00018
    Boiler blowdown0.000350.000350.000350.00035


    Several Fluids


    Group       Fluid       Fouling Factor
    OilGasoil0.00009
    Tansformer0.00018
    Lubrication0.00018
    Heat Transfer oil0.00018
    Hydraulic0.00018
     
    Gas and Vapour     Hydrogen0.00176
    Engine exhaust0.00176
    Steam0.00009
    Steam with oiltraces0.00018
    Cooling fluid vapours with oil traces      0.00035
    Organic solvent vapours0.00018
    Compressed air0.00035
    Natural gas0.00018
    Stable top products0.00018
     
    Liquid     Cooling Fluid0.00018
    Organic heat transfer fluids0.00018
    Salts0.00009
    LPG, LNG0.00018
    MEA and DEA (Amines) solutions0.00035
    DEG and TEG (Glycols) solutions0.00035
    Stable side products0.00018
    Stable bottom products0.00018
    Caustics0.00035
    Vegetable Oils0.00053


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